Between June 1975 and 1981 the South African Railways placed one hundred and twenty-four Class 36-000 GE SG10B diesel-electric locomotives in service, numbered in the range from 36-001 to 36-124. Designed by General Electric, they were built in three batches by the South African General Electric-Dorman Long Locomotive Group (SA GE-DL, later Dorbyl). The first one hundred locomotives were delivered by September 1978, followed in 1981 by two batches of twenty and four locomotives respectively.See also the Wikipedia article on the South African Class 36-000.